When you choose to render memory with a map that contains errors, the Memory viewRenderings pane will display an error message that contains options for resolving the error. For example, the error page may include options for opening the file (which would allow you to edit and save it) and for rebuilding the file. When you map memory, the map builds elements for expanded nodes only. You might not encounter errors until the node that contains an error is expanded. To fix these errors, open the map and fix the errors - and then rebuild the map. For information about editing memory layouts, see the related topic.